Frost history / Norman 3SSE, OK
Norman 3SSE, OK: frost dates by year
Last spring and first fall frost at NOAA station USC00346386, 1951 to 2025, measured from daily minimum temperatures.
Elevation 1,128 ft, 35.181, -97.438. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 4 | Nov 4 |
| Earliest | Feb 27 (2004) | Oct 7 (1952) |
| Latest | Apr 21 (1966) | Nov 27 (1965) |
| Trend | 0.9 days earlier per decade | 1.2 days later per decade |
| Years with data | 45 | 46 |
At 28°F (hard freeze) the median last spring date is Mar 22 and the median first fall date is Nov 12.
The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.
Chart
Last spring frost (32°F)
First fall frost (32°F)
Dots are single years. The gray line is the median, the green line the fitted trend.
Year by year
| Year | Last spring 32°F | First fall 32°F | Last spring 28°F | First fall 28°F |
|---|---|---|---|---|
| 2025 | Apr 7 | Nov 10 | Feb 24 | Nov 10 |
| 2024 | Mar 29 | Nov 26 | Feb 28 | Nov 29 |
| 2023 | no data | Oct 30 | no data | Oct 31 |
| 2019 | Mar 17 | Oct 12 | Mar 7 | Oct 31 |
| 2018 | Apr 16 | Nov 10 | Apr 8 | Nov 10 |
| 2017 | Mar 16 | Oct 28 | Mar 2 | Dec 7 |
| 2016 | Apr 2 | Nov 20 | Feb 27 | Nov 26 |
| 2015 | Mar 8 | Nov 13 | Mar 7 | Nov 22 |
| 2014 | Apr 16 | Nov 11 | Mar 18 | Nov 12 |
| 2013 | Apr 20 | Nov 12 | Mar 27 | Nov 13 |
| 2012 | Mar 4 | Oct 28 | Feb 26 | Nov 12 |
| 2011 | Apr 5 | Nov 4 | Mar 15 | Nov 4 |
| 2010 | Mar 23 | Nov 6 | Mar 22 | Nov 26 |
| 2009 | Apr 8 | Nov 18 | Apr 8 | Nov 26 |
| 2008 | Apr 14 | no data | Mar 9 | no data |
| 2007 | Apr 8 | Nov 7 | Mar 5 | Nov 23 |
| 2006 | Mar 25 | no data | Mar 24 | no data |
| 2005 | Mar 28 | Oct 24 | Mar 17 | Nov 16 |
| 2004 | Feb 27 | Nov 24 | Feb 26 | Nov 30 |
| 2003 | Apr 9 | Nov 23 | Mar 30 | Nov 23 |
| 2002 | Apr 3 | Nov 4 | Mar 26 | Nov 25 |
| 2001 | Mar 26 | Nov 20 | Feb 28 | Nov 20 |
| 2000 | Apr 4 | Oct 8 | Mar 12 | Oct 9 |
| 1999 | no data | Nov 24 | no data | Nov 25 |
| 1974 | Apr 5 | Nov 14 | Mar 25 | Nov 25 |
| 1973 | Apr 10 | Oct 29 | Feb 27 | Dec 6 |
| 1972 | Apr 4 | Nov 17 | Apr 1 | Nov 22 |
| 1971 | Apr 7 | Oct 31 | Apr 7 | Nov 7 |
| 1970 | Apr 5 | Nov 5 | Apr 5 | Nov 15 |
| 1969 | Mar 26 | Nov 1 | Mar 26 | Nov 15 |
| 1968 | Apr 5 | Nov 4 | Mar 23 | Nov 12 |
| 1967 | Mar 18 | Nov 4 | Mar 8 | Nov 4 |
| 1966 | Apr 21 | Oct 16 | Mar 24 | Nov 2 |
| 1965 | Mar 27 | Nov 27 | Mar 27 | Nov 29 |
| 1964 | Apr 9 | Oct 20 | Mar 30 | Nov 20 |
| 1963 | Mar 22 | Nov 2 | Mar 14 | Nov 27 |
| 1962 | Apr 2 | Nov 4 | Apr 2 | Nov 4 |
| 1961 | Apr 16 | Oct 26 | Feb 28 | Nov 3 |
| 1960 | Mar 23 | Oct 20 | Mar 23 | Nov 10 |
| 1959 | Apr 13 | Nov 5 | Mar 22 | Nov 6 |
| 1958 | Mar 20 | Nov 18 | Mar 19 | Nov 18 |
| 1957 | Apr 14 | Oct 26 | Apr 14 | Oct 26 |
| 1956 | Mar 19 | Nov 8 | Mar 19 | Nov 9 |
| 1955 | Apr 7 | Nov 3 | Mar 28 | Nov 3 |
| 1954 | Apr 1 | Oct 30 | Apr 1 | Nov 2 |
| 1953 | Apr 20 | Nov 9 | Feb 23 | Nov 9 |
| 1952 | Apr 10 | Oct 7 | Apr 10 | Nov 11 |
| 1951 | no data | Nov 1 | no data | Nov 2 |
"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.